Buying a smartphone, especially from hand or in a questionable store, always carries the risk of running into low-quality goods or outright fakes. Xiaomi is one of the most popular brands on the market, making its devices a frequent target for scammers and refurbished equipment dealers. That is why the question of how to check Xiaomi before buying becomes critical for any buyer who wants to save their money and nerves.
The inspection process does not require special engineering equipment, but requires care and knowledge of several key nuances: you will assess the physical condition of the case, the performance of the display, the compliance of the technical characteristics with the declared and, of course, the authenticity of the device through service codes. Careful diagnosis will avoid buying a brick or a device with hidden defects.
In this article, we'll break down a step-by-step algorithm that can help you identify a redesigned phone, a refurbished screen, or a trivial Chinese version with global firmware. Remember, even a sealed box from a large store can hide a surprise if the package has been opened and sealed again.
Initial inspection of packaging and configuration
The familiarity with the device begins long before it's turned on. First of all, look at the packaging. The original Xiaomi and Redmi box is made of dense cardboard with a clear, bright print. There should be a barcode sticker at the bottom, IMEI-This data must be the same as those shown on the back cover of the smartphone (if it is removable) or in the system.
When you open the box, check the kit. Depending on the model, the set can include a USB cable, charger, SIM tray clip and protective case. The cable must be of high quality, without a backlash plug. The original Xiaomi charger always has a clear marking, brand logo and the right fork (European standard if you buy a global version).
⚠️ If the box is a cheap transparent case with the logo of the apple or no logo at all, and the cable smells of burnt rubber – this is a sure sign of a reassembled device or outright fake.
And you pay special attention to factory films, because on newer devices, they often have the Mi or Redmi logo and fit tightly into the bubble-free screen, but the presence of film doesn't guarantee novelty, because they're easy to buy and paste yourself. SIM-maps: it should fit perfectly in color and shape, without hanging out in the nest.
Authentication by IMEI and codes
The most reliable way to verify the authenticity of Xiaomi is to verify the authenticity of the IMEI-Every legal smartphone has a unique ID, which you can find on a sticker on a box, in a tray. SIM-map (on some models) and in the system itself. For a quick check, dial the command *#06 in the "ringer#.
After entering the code, the data on the screen will be displayed SIM-map IMEI. Compare these numbers to the ones on the box, if they don't match, you're looking at a machine made from different parts ("Frankenstein") or a stolen phone that has had its IDs broken.
Go to the official Xiaomi authentication site in Verification, enter IMEI and CAPTCHA, the system will give the status of the device, if the site says "Not found" or shows a model different from yours, this is a clear sign of forgery, and you can also use the command ##6484## to log into the engineering menu.
It's important to understand that IMEI can be broken software, so only a comprehensive check gives complete certainty, but matching all the codes is the first and necessary filter, and if there are inconsistencies at this stage, further testing is meaningless, since the device is not original.
Screen and matrix diagnostics
The screen is the most expensive and fragile element of a smartphone. When you buy a used device or a new one from a storefront, it is the display that requires careful study. Turn the device on at maximum brightness and open a white image. Look for yellow spots, burnout (when you see the remains of the interface), or uneven lighting around the edges.
To check for touchscreen and color play, use the CIT engineering menu. To get there, dial ##64663## or go to Settings → About Phone → Kernel Version (five quick taps). From the menu, select Display or Color.
Test for broken pixels. On single-colored backgrounds (red, green, blue, white, black), carefully examine the surface. Any dot that burns in a different color or doesn't change the hue is a defect. Also check the touchscreen by swiping your finger across the diagonal of the screen in the Touchpanel test.
☑️ Checking the display
Note the viewing angles. In the original IPS or AMOLED matrix Xiaomi colors should not be inverted or faded when viewed from an angle. If the tilt phone "goes into the negative" or very dim, most likely installed a cheap copy of the screen.
Testing of hardware and sensors
After checking the screen, you need to make sure that the hardware is working, and in the same CIT engineering menu, you can test all the components, and go through the list: check the vibration, the speakers (left and right), the microphone (record yourself), and the headphone jack.
Pay special attention to communication modules. Check Wi-Fi, Bluetooth and GPS. For GPS, run a map and try to determine the location. If the phone only sees satellites outside or can not catch the signal at all, there may be problems with the antenna module.
Secret Codes for Advanced Diagnostics
The camera is another important element: take some pictures in good and low light. Check autofocus, switch between lenses (width, TV, macro). In the video, check the stabilization work: the picture should not jerk with smooth movement of the hand.
Software and version analysis
The software part can tell you more about the origin of the smartphone than the appearance. Go to Settings → About the phone. Here is the version of MIUI or HyperOS. Click a few times on the logo of the OS version to see the details.
It is important to distinguish between Global ROM and China ROM. The global version has the letter G (e.g. MIUI Global 14.0) in its title and Google preinstalled services. The Chinese version can be reflashed to the global version, which often leads to errors in notifications and banking applications. Check the presence of the Google Play Store and its operation.
Also check the bootloader status. If the phone was in use, check if the Bootloader is unlocked. To do this, press the power and volume button up when the phone is off. In Fastboot mode, look at the status: Locked is good, Unlocked is the device has been reflashed, there are risks.
| Parameter | Norma (Original) | Fake/Problem |
|---|---|---|
| Logo when loading | Clear, static or animated Mi | Blurred, text "Android", no logo |
| Name of model | Corresponds to the box (e.g. M2101K7BG) | Common name (e.g. Android Phone) |
| Screen resolution | Claimed (Full HD+, 2K, etc.) | Understated (HD, 720p on flagships) |
| Memory. | Real volume (checking in settings) | Fake volume (shows 256GB, but actually 16GB) |
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Use the CPU-Z or AIDA64 app from Play Market, and they show the real name of the processor, the screen resolution, and the amount of memory that you can't hide with fake system settings.
Checking the battery and battery status
Battery condition is a key factor when buying used equipment. Lithium-ion batteries degrade over time. In the engineering menu (#6485##) you can find information about the health of the battery, although newer versions of MIUI often hide this data.
Pay attention to the parameter. MB_06 (If it says good, great, if it says bad or poor, it's time to change the battery. MF_05 (residual receptacle) and MF_06 (Compare them if the residual capacity is significantly lower than the nominal capacity (e.g, 3000 mach 4500 mAh), battery life is exhausted.
You can visually check the bloating of the battery by putting the phone on a flat surface and trying to spin it, and if the device spins like a top or the back cover moves off the frame, the battery is swelling, and it's dangerous and requires immediate replacement.
⚠️ Warning: Fast charging should work as stated. If the phone supports 67 watts and charges an hour to 50% - the problem is in the power controller, battery or cable.
Final verification and conclusions
The final step is to test the work in real conditions. SIM-check the fingerprint scanner and face unlocks, check the fingerprint scanner and make sure the network is stable, the Internet is working, and incoming calls pass.
If all tests are successful, the IMEI codes match, the screen is free of defects, and the battery holds a charge - the purchase can be considered a success. Be sure to reset to factory settings (Settings → Advanced Settings → Reset) to delete the previous owner's account.
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The main criterion for a successful purchase is not only a working device, but also the coincidence of all identifiers, the absence of autopsy traces and a clean software history.
Remember that the savings on purchase can come out sideways if the device turns out to be rebuilt in an artisanal way. The original Xiaomi always has a build quality and materials that are difficult to fake completely. Be careful and do not rush to pay until you have a full diagnosis.